We use the description "magnetized thru thickness" to identify the locations of the poles on our block magnets. Thickness is always the last listed dimension and is also usually the smallest.
For most of our block magnets, that means that the magnets stick or repel in the middle, on the large flat surfaces, rather than at the end of the block.
A neodymium magnet can be magnetized in a handful of different directions. Rare earth magnets (NdFeb) vary in shape, and each shape has its own magnetization direction options.
Learn more about all the different magnetization direction options for rare earth magnets here.